Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; Xi'an Shiyou University, School of Materials Science and Engineering, Xi'an, 710065, China.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China.
Mater Sci Eng C Mater Biol Appl. 2020 Jan;106:110013. doi: 10.1016/j.msec.2019.110013. Epub 2019 Jul 24.
The degradation behavior of Mg-4 wt% Zn alloy with three different microstructures was examined in Hank's solution at 37 °C by electrochemical measurements and immersion tests in this study. The results show that the sample with cellular structure exhibits a more positive corrosion potential, lower corrosion current density, larger impedance and more protective film than samples with columnar dendritic and equiaxed dendritic structure. The higher corrosion resistance is attributed to the preferred orientation, eliminating susceptible grain boundaries and reduced secondary phases.
本研究通过电化学测量和浸泡试验，研究了三种不同微观结构的 Mg-4wt%Zn 合金在 37°C 的 Hank's 溶液中的降解行为。结果表明，与柱状枝晶和等轴枝晶结构的样品相比，具有胞状结构的样品具有更正的腐蚀电位、更低的腐蚀电流密度、更大的阻抗和更致密的保护膜。更高的耐腐蚀性归因于择优取向，消除了敏感晶界和减少了第二相。
